I'm not keen on their earlier stuff. For me Atom Heart Mother is getting there, and with Meddle (with Echoes) they've arrived. I like everything they've done since. I saw The Wall in concert at Earl's Court when they first toured with it. I think The Division Bell is among their best work.

(I also like Yes, and mid-period Genesis. People go on about their decline after Peter Gabriel left, but for me A Trick of the Tail is one of their best albums.)